#!/usr/bin/env python3
# coding: utf8

"""test_ldpy.

Testing `ldpy.py`

Author: frederic zind 2022-09-24
Licenses: GNU AGPL v3: http://www.gnu.org/licenses/
"""
import logging
import pytest
from pytest import mark, raises

import ldpy
from ldpy import LAST_E_CHOICES, STD_FIELDS

# Min and Max values for the request retrieving the last entries.
LAST_E_MIN = LAST_E_CHOICES[0] - 1
LAST_E_MAX = len(LAST_E_CHOICES) + 1
META_FIELDS = ["_id", "_source", "_shards", "hits"]
DEMO_STREAM_FIELDS = ["rating_num", "message", "title", "id", "category"]


# Faking options from argparse
class FakeOptions:  # pylint: disable=too-few-public-methods
    """Options object mock."""

    debug = False
    last = None
    mapping = False

    def __init__(self, options):
        """Built loggers options."""
        if "debug" in options:
            self.debug = True
        if "last" in options:
            self.last = 3
        if "mapping" in options:
            self.mapping = True


# ###
# Testing setup_logging()
# ###
def test_logging_debug():
    """Logger level is DEBUG. Set up with --debug argument."""
    options = FakeOptions(["debug"])
    ldpy.setup_logging(options)

    assert isinstance((ldpy.logger), logging.Logger)
    assert ldpy.logger.level == 10


def test_logging_default():
    """Logger level is INFO. Set up without arguments."""
    options = FakeOptions([])
    ldpy.setup_logging(options)

    assert isinstance((ldpy.logger), logging.Logger)
    assert ldpy.logger.level == 20


# ###
# Testing parse_args()
# ###
def test_parse_args():
    """Mapping argument is set."""
    cli_options = ldpy.parse_args(["--debug", "--mapping"])
    assert cli_options.debug
    assert cli_options.mapping


def test_parse_args_last_set():
    """Last argument is set to a non-default value."""
    cli_options = ldpy.parse_args(["--debug", "--last", "2"])
    assert cli_options.debug
    assert cli_options.last == 2


def test_parse_args_last_const():
    """Last argument is set to a non-default value."""
    cli_options = ldpy.parse_args(["--debug", "--last"])
    assert cli_options.debug
    assert cli_options.last == 3


# ###
# Testing strip_std_field()
# ###
@mark.parametrize("fields", [META_FIELDS, STD_FIELDS])
def test_strip_std_field(fields):
    """Remove fields present in all LDP stream."""
    payload = [
        "category",
        "gl2_source_input",
        "gl2_source_node",
        "id",
        "message",
        "rating_num",
        "source",
        "streams",
        "timestamp",
        "title",
        "X-OVH-CONTENT-SIZE",
        "X-OVH-DELIVERY-DATE",
        "X-OVH-INPUT",
    ]
    stripped_entry = ldpy.strip_std_field(payload)

    assert isinstance(stripped_entry, list)

    for field in fields:
        assert field not in stripped_entry


# ###
# Testing request_last_entries()
# ###
@mark.parametrize("opt_last", [LAST_E_MIN, LAST_E_MAX])
def test_request_last_entries_out_of_range(opt_last):
    """Value is out of range for the last entries."""
    with raises(ValueError):
        ldpy.request_last_entries(opt_last)


@pytest.mark.vcr()
@mark.parametrize(
    "opt_last, fields",
    [
        (LAST_E_CHOICES[0], DEMO_STREAM_FIELDS),
        (len(LAST_E_CHOICES), DEMO_STREAM_FIELDS),
    ],
)
def test_request_last_entries_in_range(opt_last, fields):
    """Value is in range for the last entries."""
    response_id = opt_last - 1
    response = ldpy.request_last_entries(opt_last, fields)

    assert len(response) == opt_last
    for field in STD_FIELDS:
        assert field not in response[0]["_source"]
        assert field not in response[response_id]["_source"]


# ###
# Testing main()
# ###
def test_main_without_option():
    """Called without option."""
    options = FakeOptions([])

    with raises(NotImplementedError):
        ldpy.main(options)


@pytest.mark.vcr()
def test_main_demo_with_mapping():
    """Called with mapping option.

    `main()` just transfers `request_map_props()` return: this test is not really useful
    """
    options = FakeOptions(["mapping"])
    response = ldpy.main(options)

    assert isinstance(response, list)


@pytest.mark.vcr()
def test_main_demo_with_last_const():
    """Called with last option."""
    options = FakeOptions(["last"])
    response = ldpy.main(options)

    assert isinstance(response, list)
    assert isinstance(response[0], dict)